TITLE: 05/16 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
SHIFT SUMMARY:
Started Maintenance Recovery at about 1:53pmPT with (3) issues which made recovery tough, but help from Jeff & TJ we were able to get to NLN 342pmPT.
LOG:
- 1445 Magnetic Injection
- 1446 PI 24
- 1458 Forklifting around corner (tyler & christina)
- 1458 Wind Fence work (mitch)
- Transitioned EY to "Wind Fence" mode
- After lockloss took SEI_ENV to MAINTENANCE
- 1459 Lockloss
- 1508 Turbo pump famis at EX/MX/MY (jordan)
- 1827-1852 Powering turbos off (jordan)
- 1510 Took ISC LOCK to IDLE & IMC_LOCK to OFFLINE
- 1519-1742 Turbo pump famis at LVEA (gerardo.janos)
- 1512 OBSERVATORY MODE to Preventative Maintenance
- 1523 Power Supply swap at RF rack prep: ASC0, LSC0, OMC0 models stopped AND IO Chassis powered off (dave, jeff)
- PSL OMC/FSS affected by RF
- ISI CPS' watchdog trips in Corner due to timing
- 1525-1807 EY PCal (tony, jenny)
- 1558 Laser HAZARD AND ALS laser was shuttered
- 1807 Laser SAFE and ALS shutter OPENED.
- 1524-1615 EY cleaning (cindy, kim)
- 1528-1858 EY hepta pump (travis)
- 1530 Magnetometer & cable pulling around HAM7/sqz stuff (fil)
- 1532-1712 fss alignment at PSL (jason)
- For restoring (after RF work), jason mentioned that autolockers didn't work for him
- 1551 Beckhoff work to "make screens green" (daniel)
- 1557-1847 FAMIS checks (soike)
- 1556 Access system work in lvea/Ham Shack (APS, richard)
- 1608 HAM2/3/7/8 SEI meas (jim)
- 1600 First successful SNEWS alert test
- 1624 Beckhoff reboot (daniel)
- 1640 EX fan check/changes (bubba)
- 1710 Didn't notice anything on inspection, but will switch fans via FMCS
- 1643 Hanford fire inspection up/down arms; no bldg incursions (tyler)
- 1652 Lawn service contractor
- 1657-1715 Cosmic Ray set-up/checks (adrian)
- 1710 Noticed UNIFIRST card swipe in on camera
- 1719 Power Supply work for ISC C1 & C2 racks (marc.fernando)
- 1724 All corner ISI Watchdogs tripped due to CPS (due to power supply work?)
- 1727 Jim going out to check---
- 1730 Dust Monitor #6 alarms
- 1742 EX getting accels working and packing up injection stuff (robert.anamaria)
- 1742 PSL (#102) dust alarm.
- 1809 EY Hartman laser powered on for Camilla (tony)
- 1816-1832 EX Hartman laser power on (Camilla)
- 1900
- 1915 Beginning to restore from power supplies & DAQ restart (dave).
- 1917 HVAC at EX being shut down (robert)
- 1953 Beginning to Restore H1 after Tues Maintenance!
- 1953-1955 Dark Offset Script---reason for this was the Power Supply/RF rack/Slow Controls work on the ISC Racks during Maintenance (alog 69652)
- IMC Not Locking: IMC could not lock after this (MC Trans was noticeably off in yaw); This was due to the Power Supply/Front End/rack work. To get this back, we adjusted the PSL PZTs while watching the MC2 Trans & IM4 Trans channels.
- REASON FOR ISSUE: Powering off racks during Power Supply swap caused PZT misalignment
- Y-Arm Green Alignment Issue: With an UNLOCKED Y-Arm, Flashes just couldn't get above a certain level via ETMy & TMSy. Took the NON-STANDARD step of touching the ITMy--Because all ISIs had an ISI CPS watchdog trip due to the ISI's using Timing from the ISC. ITMy yaw slider was moved to -13.7 (from -12.8).
- REASON FOR ISSUE: ISI Watchdog Trip causing small misalignmen t for ITMy
- Initial Alignment X-Arm Issue during Input Align: For Initial Alignment's Input Align step, could not lock the X-arm. It was noticed the +21 Whitening gain [H1:LSC-POP_A_RF45_WHITEN_GAIN] was the issue with the X-Arm locking---This was because of the Dark Offset script running earlier (that was done with the standard +15 Whitening gain---which is used for everything EXCEPT Initial Alignment!). And so H1:LSC-POP_A_RF45_I_OFFSET was changed from -32.677 to -70 while zeroing H1:LSC-POP_A_RF45_I_ERR_DQ while watching it on ndscope.
- REASON FOR ISSUE: Dark offsets & Whitening gain being different for Initial Alignment vs all other states!
- Separate NOTE: For next LockLoss, want to see if the IMC remains locked (due to guardian change made by TJ).
- 2132-2310 Squeezer local hazard (camilla, naoki, vicky)
- 2242 NOMINAL LOW NOISE, but no Squeezing.
To help fix the issue that Corey mentioned with the XARM_IR state and the LSC-POP_A_RF45_I_OFFSET, I've added into the PREP_ARM_IR state in ALIGN_IFO to make a new offset from a 5 second average after the whitening is changed.